| 摘要 |
In a photothermographic laser imaging system including a laser printer for exposing photothermographic media to digital data, a thermal processor for thermally developing the exposed photothermographic media to render a visual image of the digital data and a densitometer for reading the density of the visual image, a method for establishing calibration of the system comprising the steps of: reading optimum thermal processing parameters including processor temperature from a bar code associated with unexposed photothermographic media; setting the thermal processor to operate at the read parameters; exposing a calibration media by the laser printer, the calibration media including a multiple step gray scale pattern including a minimum density step, Dmin, and an upper density step, DUDP; reading with the densitometer the densities of the multiple step gray scale pattern from the developed calibration media; calculating a code value to optical density look-up-table from the read densities; and if the Dmin and DUDP values are within tolerances, using the calculated look-up-table to process successive media; but if the Dmin is greater than a predetermined value, adjusting the thermal processor temperature down, and if said DUDP is less than a predetermined value, adjusting the thermal processor temperature up.
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